CSV to JSON

Convert CSV tables to a JSON array of objects or array of arrays with configurable delimiter and header options.

For this tool, processing runs locally in your browser and data is not sent to the server.

CSV to JSON is a free online converter that transforms a CSV table into a JSON array of objects or array of arrays. It supports auto-detected and manual delimiters, header row detection, and optional type inference. The tool runs in your browser and does not send data to the server.

What it does

Output

Processing

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How to use

Paste a CSV table with or without headers.
Choose a delimiter: auto, comma, semicolon, tab, or custom.
Configure the result structure: array of objects or array of arrays.
Copy the JSON for scripts, no-code tools, APIs, tests, data import, or documentation.

More about this tool

CSV to JSON converts a CSV table into a JSON array of objects or array of arrays. The tool is useful for scripts, no-code tools, APIs, test data, data import, documentation, and payload preparation.

You can choose a column delimiter (comma, semicolon, tab, or custom), use the first row as headers, skip empty rows, trim values, and optionally infer types for numeric and boolean fields. The service correctly handles quoted values, embedded quotes, and line breaks within cells when using a proper CSV parser.

All processing is done locally in the browser. Your data is not sent to the server.

Runs in the browser
Data is not sent to the server
Converts CSV to JSON
Supports column headers
Supports comma, semicolon, and tab delimiters
Can output array of objects or array of arrays
Shows a table preview
Helps identify CSV errors
No registration required

Frequently Asked Questions

How do I convert CSV to JSON?

Paste the CSV, choose a delimiter and result structure, then click Convert. The tool outputs a JSON array of objects or array of arrays.

Is a header row required?

For an array of objects, the first row is typically used as headers and becomes the field names. Without headers, generic names such as column1, column2 are used.

Which delimiter should I choose?

Comma is common, but spreadsheet exports (especially in European locales) often use a semicolon. You can choose auto-detect or specify the delimiter manually.

Are quoted values supported?

Yes. The CSV parser correctly handles values in quotes, embedded quotes inside values, and line breaks within cells.

Can I keep numbers as strings?

Yes. All values are kept as strings by default to avoid corrupting phone numbers, zip codes, product codes, and IDs. Type inference can be enabled separately.

What happens to empty values?

Empty values can be left as empty strings or converted to null, depending on the selected setting.

What if rows have different numbers of columns?

The tool shows a warning because such rows can produce incomplete or ambiguous JSON.

How is CSV to JSON different from the JSON Formatter?

CSV to JSON converts tabular data into JSON. The JSON Formatter works with existing JSON and makes it readable.

Is my data sent to the server?

No. CSV is processed locally in the browser and is not sent to the server.

Do I need to register?

No. The tool works immediately without registration.

More about this tool

CSV to JSON converts a CSV table into a JSON array of objects or array of arrays. The tool is useful for scripts, no-code tools, APIs, test data, data import, documentation, and payload preparation.

All processing is done locally in the browser. Your data is not sent to the server.

Runs in the browser
Data is not sent to the server
Converts CSV to JSON
Supports column headers
Supports comma, semicolon, and tab delimiters
Can output array of objects or array of arrays
Shows a table preview
Helps identify CSV errors
No registration required

Frequently Asked Questions

How do I convert CSV to JSON?

Paste the CSV, choose a delimiter and result structure, then click Convert. The tool outputs a JSON array of objects or array of arrays.

Is a header row required?

For an array of objects, the first row is typically used as headers and becomes the field names. Without headers, generic names such as column1, column2 are used.

Which delimiter should I choose?

Comma is common, but spreadsheet exports (especially in European locales) often use a semicolon. You can choose auto-detect or specify the delimiter manually.

Are quoted values supported?

Yes. The CSV parser correctly handles values in quotes, embedded quotes inside values, and line breaks within cells.

Can I keep numbers as strings?

Yes. All values are kept as strings by default to avoid corrupting phone numbers, zip codes, product codes, and IDs. Type inference can be enabled separately.

What happens to empty values?

Empty values can be left as empty strings or converted to null, depending on the selected setting.

What if rows have different numbers of columns?

The tool shows a warning because such rows can produce incomplete or ambiguous JSON.

How is CSV to JSON different from the JSON Formatter?

CSV to JSON converts tabular data into JSON. The JSON Formatter works with existing JSON and makes it readable.

Is my data sent to the server?

No. CSV is processed locally in the browser and is not sent to the server.

Do I need to register?

No. The tool works immediately without registration.